1OLC

OLIGO-PEPTIDE BINDING PROTEIN (OPPA) COMPLEXED WITH LYS-LYS-LYS-ALA

• PDB DOI: https://doi.org/10.2210/pdb1OLC/pdb

• Classification: COMPLEX (BINDING PROTEIN/PEPTIDE)
• Organism(s): Salmonella enterica subsp. enterica serovar Typhimurium
• Mutation(s): No 


• Deposited: 1995-09-10 Released: 1996-01-29 
• Deposition Author(s): Tame, J., Wilkinson, A.J.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 0.197 
• R-Value Observed: 0.143 

Literature

The crystal structures of the oligopeptide-binding protein OppA complexed with tripeptide and tetrapeptide ligands.

Tame, J.R., Dodson, E.J., Murshudov, G., Higgins, C.F., Wilkinson, A.J.

(1995) Structure 3: 1395-1406

• PubMed: 8747465 
• DOI: https://doi.org/10.1016/s0969-2126(01)00276-3
• Primary Citation of Related Structures:  
  1OLC, 2OLB


• PubMed Abstract: 
  

  The periplasmic oligopeptide-binding protein OppA has a remarkably broad substrate specificity, binding peptides of two or five amino-acid residues with high affinity, but little regard to sequence. It is therefore an ideal system for studying how different chemical groups can be accommodated in a protein interior. The ability of the protein to bind peptides of different lengths has been studied by co-crystallising it with different ligands.

---

Organizational Affiliation: 

Department of Chemistry, University of York, UK.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 61.52 kDa 
• Atom Count: 4,553 
• Modelled Residue Count: 521 
• Deposited Residue Count: 521 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
OLIGO-PEPTIDE BINDING PROTEIN	A	517	Salmonella enterica subsp. enterica serovar Typhimurium	Mutation(s): 0
UniProt
Find proteins for P06202 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720)) Explore P06202  Go to UniProtKB:  P06202

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
LYS-LYS-LYS-ALA	B	4	N/A	Mutation(s): 0

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
IUM	C [auth A], D [auth A], E [auth A], F [auth A], G [auth A], H [auth A], I [auth A], J [auth A]	URANYL (VI) ION O2 U IZLHQJIUOZHTLW-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 0.197 
• R-Value Observed: 0.143 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 110.73	α = 90
b = 77.08	β = 90
c = 71.33	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
PROLSQ	refinement

Structure Validation

Entry History 

Deposition Data

• Released Date: 1996-01-29 
Deposition Author(s): Tame, J., Wilkinson, A.J.

Revision History  

• Version 1.0: 1996-01-29
  Type: Initial release
  
• Version 1.1: 2008-03-03
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance